CUET · PHYSICS · PYQ PAPER 2025
In a Wheatstone Bridge, all the four arms have equal resistance r. If the resistance of the galvanometer arm is also equal to r, the equivalent resistance of the combination will be
- A 0.25 r
- B 0.5 r
- C r
- D 2 r
Answer & Solution
Correct Answer
(C) r
Step-by-step Solution
Detailed explanation
The bridge is balanced as \( \frac{r}{r} = \frac{r}{r} \). The galvanometer arm can be removed for equivalent resistance calculation. Equivalent resistance of top branch: \( r + r = 2r \) Equivalent resistance of bottom branch: \( r + r = 2r \) Equivalent resistance of parallel…
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